Audio Precision System 1 relays - diyAudio
Go Back   Home > Forums > Design & Build > Equipment & Tools

Equipment & Tools From test equipment to hand tools

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 26th June 2014, 12:27 AM   #1
diyAudio Member
 
Loudthud's Avatar
 
Join Date: Nov 2007
Location: Near Dallas Texas USA
Default Audio Precision System 1 relays

My Audio Precision System 1 (config -11S) has a bad relay (I'm guessing) on the Generator output attenuator. As you try to adjust the output (unbal-float) below 330mV the output jumps up to 931mV and maintains about an 8.5dB error as the output is adjusted lower.

There are 8 IIRC DIP relays between the output transformer and the front panel, I'm guessing these form part of the attenuator for generator output. There is also a DAC somewhere that is used to adjust generator output. Should I just socket and replace the relays? Do I need special relays or will cheap telecom types be ok?
  Reply With Quote
Old 28th June 2014, 04:13 PM   #2
RNMarsh is offline RNMarsh  United States
diyAudio Member
 
RNMarsh's Avatar
 
Join Date: May 2012
Location: 2457 Cascade Trail; Cool, CA. 95614
The relays may be the same as A_P uses on new models. Might give them a call to se if they will sell you one or give mfr/pn for an exact replacement. A-P should be able to help you... thy are very customer friendly.

-RM
  Reply With Quote
Old 4th July 2014, 06:19 AM   #3
tomchr is offline tomchr  United States
diyAudio Member
 
tomchr's Avatar
 
Join Date: Feb 2009
Location: Greater Seattle Area
Google or Bing whatever numbers are on the top of the relay. That's how I identified the COTO relays used in one of my HP instruments.

~Tom
__________________
21st Century Maida Regulator, Universal Filament Regulator, Damn Good 300B, Novar Spud, and more...
Neurochrome : : Audio - http://www.neurochrome.com/audio - Engineering : : Done : : Right
  Reply With Quote
Old 5th July 2014, 12:29 AM   #4
diyAudio Member
 
Join Date: Mar 2005
Location: Los Angeles, california
I bought mine from AP for around $6.00 each.

Art
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Audio Precision System Two - 2322 eboz Swap Meet 2 18th July 2013 03:16 PM
Audio Precision System 1 mickeymoose Swap Meet 4 23rd April 2010 06:47 PM
Audio Precision System One 11G Michael Rothacher Swap Meet 7 19th April 2010 12:53 PM
Audio Precision System One for sale marcreviel Swap Meet 0 2nd December 2002 05:18 AM
Audio Precision System One 02G Michael Rothacher Swap Meet 0 22nd November 2002 03:17 AM


New To Site? Need Help?

All times are GMT. The time now is 11:02 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2